- Radio Free Europe/Radio Liberty Research Institute (RFE/RL Research Institute)72
- Leningradskaia Studiia Dokumentalnykh Filmov (LSDF)3
- Mandelʹshtam, Nadezhda3
- Mihajlov, Mihajlo3
- Belarusfilm2
- Berdiaev, Nikolai2
- Conquest, Robert2
- Etkind, E. G.2
- Lennauchfilm2
- Matthews, Mervyn2
- Sebag Montefiore, Simon2
- Service, Robert2
- Tsentralnaia Studiia Dokumentalnykh Filmov (TsSDF)2
- Applebaum, Anne1
- Azerbaijanfilm1
- Beria, Sergo Lavrentevich1
- Bookbinder, Alan1
- Brackman, Roman1
- Brandes, Georg1
- Brendon, Piers1